Warning sign on some Xbox digital owned game and uncomplete game library

If you own the games digitally, then they will show up in your game library on the Xbox app, just make sure you are signed in with the same account that was used to purchase the games on both the Xbox app and the Microsoft Store. If you own the games on disc, then you will not be able to get them for PC, as the entitlement is for digital owners only.

Do you own the game on disc or digital? If it's disc, then that will be why the game does not show in your library on PC, as you need to own the digital version for that to show up in your PC library.

If you own the game digitally, sign onto your Windows 10 PC using the exact same Microsoft account you use on Xbox One. The game should appear in your Game Library, or appear in the Windows Store with the "Install" tile.

If you own the game on disc, that is just for Xbox One and is not Play Anywhere-compatible.

Hi, Todd. I’m Arturo, and I’ll be glad to provide some assistance with your inquiry today.

The warning symbol means you don’t own the digital license of the game with this icon, or, you don’t have the disc inserted in case you own the game physically.

Please be aware that some games like Outriders, and Subnautica, left the game pass library a couple of weeks ago in the case of Outriders and months ago for Subnautica. (In case you played those games via Game Pass)

Moreover, it is important to clarify that your progress on those games is not lost.
You can access to this progress as long as you decide to purchase the digital version or a physical copy of them.

If you own the digital copy, as mentioned above, make sure you are signed in to the Windows door with the same account used to purchase the game.

You will then be able to click on the 3 doors next to your picture in the top right and under My Library it should list all the digital games you own that you can install.